[572484f] | 1 | /* |
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| 2 | * BSP startup |
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| 3 | * |
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| 4 | * This routine starts the application. It includes application, |
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| 5 | * board, and monitor specific initialization and configuration. |
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| 6 | * The generic CPU dependent initialization has been performed |
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| 7 | * before this routine is invoked. |
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| 8 | * |
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| 9 | * Author: |
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| 10 | * David Fiddes, D.J@fiddes.surfaid.org |
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| 11 | * http://www.calm.hw.ac.uk/davidf/coldfire/ |
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| 12 | * |
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| 13 | * COPYRIGHT (c) 1989-1998. |
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| 14 | * On-Line Applications Research Corporation (OAR). |
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| 15 | * Copyright assigned to U.S. Government, 1994. |
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| 16 | * |
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| 17 | * The license and distribution terms for this file may be |
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| 18 | * found in the file LICENSE in this distribution or at |
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| 19 | * |
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| 20 | * http://www.OARcorp.com/rtems/license.html. |
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| 21 | * |
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| 22 | * $Id$ |
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| 23 | */ |
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| 24 | |
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| 25 | #include <bsp.h> |
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| 26 | #include <rtems/libio.h> |
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| 27 | #include <rtems/libcsupport.h> |
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| 28 | #include <string.h> |
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[7eab0f78] | 29 | #include <errno.h> |
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[572484f] | 30 | |
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| 31 | /* |
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| 32 | * The original table from the application and our copy of it with |
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| 33 | * some changes. |
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| 34 | */ |
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| 35 | extern rtems_configuration_table Configuration; |
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| 36 | rtems_configuration_table BSP_Configuration; |
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| 37 | rtems_cpu_table Cpu_table; |
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| 38 | char *rtems_progname; |
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| 39 | |
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| 40 | /* |
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| 41 | * Location of 'VME' access |
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| 42 | */ |
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| 43 | #define VME_ONE_BASE 0x30000000 |
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| 44 | #define VME_TWO_BASE 0x31000000 |
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| 45 | |
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| 46 | /* |
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| 47 | * Cacheable areas |
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| 48 | */ |
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| 49 | #define SDRAM_BASE 0 |
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| 50 | #define SDRAM_SIZE (16*1024*1024) |
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| 51 | #define FLASH_BASE 0x10C10000 |
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| 52 | #define FLASH_SIZE (4*1024*1024) |
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| 53 | |
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| 54 | /* |
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| 55 | * CPU-space access |
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| 56 | */ |
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| 57 | #define m68k_set_cacr(_cacr) asm volatile ("movec %0,%%cacr" : : "d" (_cacr)) |
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| 58 | #define m68k_set_acr0(_acr0) asm volatile ("movec %0,%%acr0" : : "d" (_acr0)) |
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| 59 | #define m68k_set_acr1(_acr1) asm volatile ("movec %0,%%acr1" : : "d" (_acr1)) |
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| 60 | |
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| 61 | /* |
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| 62 | * Read/write copy of common cache |
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| 63 | * Split I/D cache |
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| 64 | * Allow CPUSHL to invalidate a cache line |
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| 65 | * Enable buffered writes |
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| 66 | * No burst transfers on non-cacheable accesses |
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| 67 | * Default cache mode is *disabled* (cache only ACRx areas) |
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| 68 | */ |
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| 69 | static unsigned32 cacr_mode = MCF5XXX_CACR_CENB | |
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| 70 | MCF5XXX_CACR_DBWE | |
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| 71 | MCF5XXX_CACR_DCM; |
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| 72 | /* |
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| 73 | * Cannot be frozen |
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| 74 | */ |
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| 75 | void _CPU_cache_freeze_data(void) {} |
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| 76 | void _CPU_cache_unfreeze_data(void) {} |
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| 77 | void _CPU_cache_freeze_instruction(void) {} |
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| 78 | void _CPU_cache_unfreeze_instruction(void) {} |
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| 79 | |
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| 80 | /* |
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| 81 | * Write-through data cache -- flushes are unnecessary |
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| 82 | */ |
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| 83 | void _CPU_cache_flush_1_data_line(const void *d_addr) {} |
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| 84 | void _CPU_cache_flush_entire_data(void) {} |
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| 85 | |
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| 86 | void _CPU_cache_enable_instruction(void) |
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| 87 | { |
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| 88 | rtems_interrupt_level level; |
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| 89 | |
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| 90 | rtems_interrupt_disable(level); |
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| 91 | cacr_mode &= ~MCF5XXX_CACR_DIDI; |
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| 92 | m68k_set_cacr(cacr_mode); |
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| 93 | rtems_interrupt_enable(level); |
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| 94 | } |
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| 95 | |
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| 96 | void _CPU_cache_disable_instruction(void) |
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| 97 | { |
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| 98 | rtems_interrupt_level level; |
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| 99 | |
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| 100 | rtems_interrupt_disable(level); |
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| 101 | cacr_mode |= MCF5XXX_CACR_DIDI; |
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| 102 | m68k_set_cacr(cacr_mode); |
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| 103 | rtems_interrupt_enable(level); |
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| 104 | } |
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| 105 | |
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| 106 | void _CPU_cache_invalidate_entire_instruction(void) |
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| 107 | { |
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| 108 | m68k_set_cacr(cacr_mode | MCF5XXX_CACR_CINV | MCF5XXX_CACR_INVI); |
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| 109 | } |
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| 110 | |
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| 111 | void _CPU_cache_invalidate_1_instruction_line(const void *addr) |
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| 112 | { |
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[518edef] | 113 | /* |
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| 114 | * Top half of cache is I-space |
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| 115 | */ |
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| 116 | addr = (void *)((int)addr | 0x400); |
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| 117 | asm volatile ("cpushl %%bc,(%0)" :: "a" (addr)); |
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[572484f] | 118 | } |
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| 119 | |
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| 120 | void _CPU_cache_enable_data(void) |
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| 121 | { |
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| 122 | rtems_interrupt_level level; |
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| 123 | |
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| 124 | rtems_interrupt_disable(level); |
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| 125 | cacr_mode &= ~MCF5XXX_CACR_DISD; |
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| 126 | m68k_set_cacr(cacr_mode); |
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| 127 | rtems_interrupt_enable(level); |
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| 128 | } |
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| 129 | |
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| 130 | void _CPU_cache_disable_data(void) |
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| 131 | { |
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| 132 | rtems_interrupt_level level; |
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| 133 | |
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[518edef] | 134 | rtems_interrupt_disable(level); |
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[572484f] | 135 | rtems_interrupt_disable(level); |
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| 136 | cacr_mode |= MCF5XXX_CACR_DISD; |
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| 137 | m68k_set_cacr(cacr_mode); |
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| 138 | rtems_interrupt_enable(level); |
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| 139 | } |
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| 140 | |
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| 141 | void _CPU_cache_invalidate_entire_data(void) |
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| 142 | { |
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| 143 | m68k_set_cacr(cacr_mode | MCF5XXX_CACR_CINV | MCF5XXX_CACR_INVD); |
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| 144 | } |
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| 145 | |
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| 146 | void _CPU_cache_invalidate_1_data_line(const void *addr) |
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| 147 | { |
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[518edef] | 148 | /* |
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| 149 | * Bottom half of cache is D-space |
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| 150 | */ |
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| 151 | addr = (void *)((int)addr & ~0x400); |
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| 152 | asm volatile ("cpushl %%bc,(%0)" :: "a" (addr)); |
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[572484f] | 153 | } |
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| 154 | |
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| 155 | /* |
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| 156 | * Use the shared implementations of the following routines |
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| 157 | */ |
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| 158 | void bsp_postdriver_hook(void); |
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| 159 | void bsp_libc_init( void *, unsigned32, int ); |
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| 160 | void bsp_pretasking_hook(void); /* m68k version */ |
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| 161 | |
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| 162 | /* |
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| 163 | * bsp_start |
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| 164 | * |
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| 165 | * This routine does the bulk of the system initialisation. |
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| 166 | */ |
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| 167 | void bsp_start( void ) |
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| 168 | { |
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| 169 | extern char _WorkspaceBase[]; |
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| 170 | extern char _RamSize[]; |
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| 171 | extern unsigned long _M68k_Ramsize; |
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| 172 | |
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| 173 | _M68k_Ramsize = (unsigned long)_RamSize; /* RAM size set in linker script */ |
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| 174 | |
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| 175 | /* |
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| 176 | * Allocate the memory for the RTEMS Work Space. This can come from |
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| 177 | * a variety of places: hard coded address, malloc'ed from outside |
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| 178 | * RTEMS world (e.g. simulator or primitive memory manager), or (as |
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| 179 | * typically done by stock BSPs) by subtracting the required amount |
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| 180 | * of work space from the last physical address on the CPU board. |
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| 181 | */ |
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| 182 | |
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| 183 | /* |
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| 184 | * Need to "allocate" the memory for the RTEMS Workspace and |
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| 185 | * tell the RTEMS configuration where it is. This memory is |
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| 186 | * not malloc'ed. It is just "pulled from the air". |
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| 187 | */ |
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| 188 | |
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| 189 | BSP_Configuration.work_space_start = (void *)_WorkspaceBase; |
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| 190 | |
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| 191 | /* |
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| 192 | * initialize the CPU table for this BSP |
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| 193 | */ |
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| 194 | Cpu_table.pretasking_hook = bsp_pretasking_hook; /* init libc, etc. */ |
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| 195 | Cpu_table.postdriver_hook = bsp_postdriver_hook; |
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| 196 | Cpu_table.do_zero_of_workspace = TRUE; |
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| 197 | Cpu_table.interrupt_stack_size = 4096; |
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| 198 | |
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| 199 | Cpu_table.interrupt_vector_table = (m68k_isr *)0; /* vectors at start of RAM */ |
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| 200 | |
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| 201 | /* |
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| 202 | * Invalidate the cache and disable it |
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| 203 | */ |
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| 204 | m68k_set_acr0(0); |
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| 205 | m68k_set_acr1(0); |
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| 206 | m68k_set_cacr(MCF5XXX_CACR_CINV); |
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| 207 | |
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| 208 | /* |
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| 209 | * Cache SDRAM and FLASH |
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| 210 | */ |
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| 211 | m68k_set_acr0(MCF5XXX_ACR_AB(SDRAM_BASE) | |
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| 212 | MCF5XXX_ACR_AM(SDRAM_SIZE-1) | |
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| 213 | MCF5XXX_ACR_EN | |
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| 214 | MCF5XXX_ACR_BWE | |
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| 215 | MCF5XXX_ACR_SM_IGNORE); |
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| 216 | m68k_set_acr1(MCF5XXX_ACR_AB(FLASH_BASE) | |
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| 217 | MCF5XXX_ACR_AM(FLASH_SIZE-1) | |
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| 218 | MCF5XXX_ACR_EN | |
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| 219 | MCF5XXX_ACR_BWE | |
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| 220 | MCF5XXX_ACR_SM_IGNORE); |
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| 221 | |
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| 222 | /* |
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| 223 | * Enable the cache |
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| 224 | */ |
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| 225 | m68k_set_cacr(cacr_mode); |
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| 226 | |
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| 227 | /* |
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| 228 | * Set up CS* space (fake 'VME') |
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| 229 | * Two A24/D16 spaces, supervisor data acces |
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| 230 | */ |
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| 231 | MCF5282_CS1_CSAR = MCF5282_CS_CSAR_BA(VME_ONE_BASE); |
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| 232 | MCF5282_CS1_CSMR = MCF5282_CS_CSMR_BAM_16M | |
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| 233 | MCF5282_CS_CSMR_CI | |
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| 234 | MCF5282_CS_CSMR_SC | |
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| 235 | MCF5282_CS_CSMR_UC | |
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| 236 | MCF5282_CS_CSMR_UD | |
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| 237 | MCF5282_CS_CSMR_V; |
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| 238 | MCF5282_CS1_CSCR = MCF5282_CS_CSCR_PS_16; |
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| 239 | MCF5282_CS2_CSAR = MCF5282_CS_CSAR_BA(VME_TWO_BASE); |
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| 240 | MCF5282_CS2_CSMR = MCF5282_CS_CSMR_BAM_16M | |
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| 241 | MCF5282_CS_CSMR_CI | |
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| 242 | MCF5282_CS_CSMR_SC | |
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| 243 | MCF5282_CS_CSMR_UC | |
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| 244 | MCF5282_CS_CSMR_UD | |
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| 245 | MCF5282_CS_CSMR_V; |
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| 246 | MCF5282_CS2_CSCR = MCF5282_CS_CSCR_PS_16; |
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| 247 | } |
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| 248 | |
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| 249 | unsigned32 get_CPU_clock_speed(void) |
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| 250 | { |
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| 251 | extern char _CPUClockSpeed[]; |
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| 252 | return( (unsigned32)_CPUClockSpeed); |
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| 253 | } |
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[7eab0f78] | 254 | |
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| 255 | /* |
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| 256 | * Arcturus routines for getting value from bootloader |
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| 257 | */ |
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| 258 | #define __bsc_return(type, res) \ |
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| 259 | do { \ |
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| 260 | if ((unsigned long)(res) >= (unsigned long)(-64)) { \ |
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| 261 | errno = -(res); \ |
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| 262 | res = -1; \ |
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| 263 | } \ |
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| 264 | return (type)(res); \ |
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| 265 | } while (0) |
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| 266 | #define _bsc1(type,name,atype,a) \ |
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| 267 | type uC5282_##name(atype a) \ |
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| 268 | { \ |
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| 269 | long __res; \ |
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| 270 | register long __a __asm__ ("%d1") = (long)a; \ |
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| 271 | __asm__ __volatile__ ("move.l %0,%%d0\n\t" \ |
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| 272 | "trap #2\n\t" \ |
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| 273 | "move.l %%d0,%0" \ |
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| 274 | : "=d" (__res) \ |
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| 275 | : "0" (__BN_##name), "d" (__a) \ |
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| 276 | : "d0" ); \ |
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| 277 | __bsc_return(type,__res); \ |
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| 278 | } |
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| 279 | #define __BN_gethwaddr 12 /* get the hardware address of my interfaces */ |
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| 280 | #define __BN_getbenv 14 /* get a bootloader envvar */ |
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| 281 | #define __BN_setbenv 15 /* get a bootloader envvar */ |
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| 282 | _bsc1(unsigned const char *, gethwaddr, int, a) |
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| 283 | _bsc1(char *, getbenv, const char *, a) |
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